UT Woven Undertile Membrane Brochure

UT Woven® Undertile membrane
TM
Installation
SANS 952-2-1985 Type E
ECO SHIELDTM UT WOVEN® UNDERTILE MEMBRANE – SANS 952-2-1985 Type E
Property
Requirements
Thickness, Um, min.
350
Mass per unit area, min, g/m2
100
Tensile properties
a) Breaking strength, N/mm of width, min.
b) Elongation at break, %, min.
2,16 min
50
Puncture resistance, N/mm of
thickness, min.
(Optional test, see 4.5.3)
Tear Strength, N/mm of thickness, min.
Resistance to accelerated aging,
% property
Retention, min
a) Breaking strength
b) Elongation at break
Resistance to accelerated
weathering, % property
Retention, min
a) Breaking strength
b) Elongation at break
Water vapour transmission rate,
g/m 2 .24 h, max
29,0
65,0
90
90
80
80
2.9
Installation Instructions
One layer of Eco Shield UT Woven weatherproof sheeting,
installed over common rafters and under battens to receive
tiles. Allow a minimum overlap of 100 mm.
Eco ShieldTM UT Woven Undertile membrane
Eco ShieldTM UT Woven is a new woven polypropylene
membrane that has been specifically formulated
for use under roof tiles. It is 350 (micrometer)
in thickness and made in rolls of 1,5 x 30 m. UT
Woven is dimensionally stable, light in weight and
weatherproof, handling and installation are easy,
and will seal around nails.
It is used for the prevention of draughts and dust
penetration into the roof spaces through tiles and
prevents damage to ceilings, rotting of timbers and
corrosion of plumbing. Dust can also penetrate
between cornices and walls, initiating or aggravating
allergies in susceptible people. The membrane is
also designed to prevent moisture from warm, damp
air reaching and condensing on the ceiling boards
and other vulnerable points in the building fabric.
Installation guidelines – undertile
membrane
• For detailed installation guidelines, please contact
AVENG Manufacturing Infraset Building Products
or visit our website www.avengman.com.
The Eco ShieldTM radiant barrier consists of various
laminates and each product has been specially formulated
for a specific insulation application - be it industrial or
domestic.
Diagramatic representation of steps to laying Eco ShieldTM
radiant barrier:
Storage and handling
Concrete Roof Tiles
• Store rolls upright on a level surface, preferably under
cover.
• Rolls stored outside must be protected from longterm
UV exposure.
• Take care not to tear or damage the fabric during
handling.
Rafters
Batten
Tie Beam
UT Woven also prevents strong wind from lifting and
ripping off roof tiles. Most home loan institutions
insist on the use of under-tile membrane where the
roof pitch is less than 26 degrees or more than 45
degrees and in exposed coastal areas.
Eco Shield Radiant Barrier
Ceiling
Closed Soffit Detail
Boarding to be used at the open eaves to carry the
Eco Shield UT Woven to the gutter. The boarding gives
added security to the structure because it prevents wind-lift
of the tiles from the underside of the open soffit.
Open Soffit Detail
Turn down the Eco Shield UT Woven over the fascia board
at the eaves and seal into the gutter.
Min. 100 mm
LDPE Bonding 23 gsm
80 gsm Spunbond
Steel structure
PVC straining wires
Benefits
• The material equalises the pressure and complements the
function of the roof tiles.
• It is flexible and easily handled.
• It is used for the prevention of draughts and dust
penetration into the roof spaces through tiles, and
prevents damage to ceilings, rotting of timbers and
corrosion of plumbing.
• The membrane is also designed to prevent moisture
from warm damp air reaching and condensing on ceiling
boards and other vulnerable points in the building fabric.
Purlins
Eco Shield Radiant Barrier
Metal roof covering
Guide to setting out wire spacings
75 mm
338 mm
338 mm
338 mm
338 mm
75 mm
Steel structure
PVC straining wires
Purlins
27
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